Podcast
Questions and Answers
Why is tin used in tin cans for storing food?
Why is tin used in tin cans for storing food?
- Tin is a better conductor of electricity than iron.
- Tin is less reactive than iron. (correct)
- Tin is more reactive than iron.
- Tin is cheaper than iron.
Why is zinc coated on iron in bridges and automobiles?
Why is zinc coated on iron in bridges and automobiles?
- To make it look shiny.
- To prevent it from coming in contact with water.
- To increase its weight.
- To protect it from corrosion and rust. (correct)
What are the chemical effects produced when an electric current passes through a conducting liquid?
What are the chemical effects produced when an electric current passes through a conducting liquid?
- Change in color.
- Formation of bubbles.
- Increase in temperature.
- Chemical reactions. (correct)
Why is the disposal of used conducting solution a major concern in electroplating factories?
Why is the disposal of used conducting solution a major concern in electroplating factories?
What do most liquids that conduct electricity contain?
What do most liquids that conduct electricity contain?
What is the process called when a layer of metal is deposited on another material using electricity?
What is the process called when a layer of metal is deposited on another material using electricity?
What happens when electrodes are immersed in water and a current is passed through?
What happens when electrodes are immersed in water and a current is passed through?
How can the chemical change taking place in the solution be described?
How can the chemical change taking place in the solution be described?
What happens to the electrodes when an electric current passes through a conducting solution?
What happens to the electrodes when an electric current passes through a conducting solution?
What did William Nicholson's experiment with water and electrodes demonstrate?
What did William Nicholson's experiment with water and electrodes demonstrate?
What can cause changes of color in solutions when an electric current passes through?
What can cause changes of color in solutions when an electric current passes through?
What did Boojho observe when he inserted copper wires into a potato and left them for half an hour?
What did Boojho observe when he inserted copper wires into a potato and left them for half an hour?
Why is it dangerous to touch an electrical appliance with wet hands?
Why is it dangerous to touch an electrical appliance with wet hands?
What type of materials are good conductors of electricity?
What type of materials are good conductors of electricity?
What did the tester help determine about materials in Class VI?
What did the tester help determine about materials in Class VI?
Which materials conduct electricity according to the text?
Which materials conduct electricity according to the text?
What caution is provided by Paheli and Boojho when experimenting with electricity?
What caution is provided by Paheli and Boojho when experimenting with electricity?
Why should one not experiment with electric supply from mains, generator, or inverter?
Why should one not experiment with electric supply from mains, generator, or inverter?
